Showerhead holder



FIG. 1 is a perspective view of a showerhead holder showing our new design;

FIG. 2 is a top plan view thereof, the opposite side being a mirror image of the side shown;

FIG. 3 is a first side view thereof; and,

FIG. 4 is a second side view thereof.

The broken line showing of a mounting stem is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a showerhead holder, as shown and described. 